James elliott



(No Model.)

J. ELLIOTT.

, APPARATUS FOR GONSUMING SMOKE IN FURNACES. No. 293.436.

PatentedE'Qb. 12, 1884.

I IIIIIIIIIIIIIIIIII man STATES PATENT Erica. 1

JAMES ELLIOTT, or MONTREAL, QUEBEC, CANADA.

APPARATUS FOR CONSUIVHNG SMOKE IN FURNACES.

SPECIFICATION forming part of Letters Patent No. 293,436, dated February 1.2, 1884. I

Application filed September 6, 1883. (No model.)

5 invented certain new and .useful Improvements in Apparatus for Consuming Smoke in Furnaces; and I do hereby declare that the following is a full, clear, and exact description of the same.

IO This invention has reference to improve-- ments in the art of consuming the smoke which arises from the fires of furnaces, the same being particularly applicable, in whole and in part, to reverberatory furnaces, and some parts I 5 to blast and boiler furnaces.

The improvements consist, first, in the introduction of air near the neck or entrance of the flue by means of passages cut through the arch at top and sides, said air being brought from the exterior of the furnace and in a chamber formed outside said arch before being admitted to the smoke chamber or flue; secondly, in the introduction of air above the fire, the same being brought from underneath 2 the grate by passages or lines arranged in the side walls, said passages being joined together in another passage or fiue above the fire, and

the air forced over'the fire by means of a fan or blower; and, thirdly, in the combination,

with said air-passages, of steamjets arranged to discharge over the fire.

For full comprehension, however, of my improvements, reference must be hadto the following detailed description, and to the accompanying drawings, in all of which similar letters of reference denote like parts.

In the drawings, Figure 1 represents a plan, partly in section, of a furnace embodying my invention; Fig. 2, a vertical section of same;

Fig. 3, a cross-section on line X X, Figs. 1 and 2; Fig. 4, a cross-section on line Y Y, Fig. 2; and Fig. 5, adetail showing arrangement of air-inlets through arch.

A represents the fire-chamber of a rev erber- 4 5 atory furnace; a, the grate; B, the ash-pit; c,the

bridge; 0, the metal chamber or hearth; D, the neck, and E the arch, located just beyond the neck and at the entrance to the chimney or flue F. This arch is formed preferably of brickwork, the bricks being cut away, as shownin detail in Fig. 5, at intervals, so as to form a series of openings or passages, e e, and outside of this arch a hood, G, of brick or metal, is placed in such manner that a space or chamber, will be formed between them, into which. air from the exterior of the furnace can flow through a suitable opening, 9, controlled by a damper,

9 The air is heated in passing through this chamber 9, and is drawn downward through the passages e e by the draft of furnace into the neck or base of the flue leading to the chimney. a

At the front or side of the chamber A, to: ward its crown and at right angles to the line of draft, I construct in the brick-work or 0th erwise,..a-s may be found desirable, a passage or flue, H, provided with a suitable number of openings, 71. 71., on that side which projects toward the bridge-wall c,- or this. side of the flue may have a long opening, if preferred. I also construct in the side walls of the furnace vertical flues J J, opening into the ash-pit at their lower ends, and forming a junction with the flue H, at each end of same, as seen in Figs. 1, 2, and 3.

Along the side of the fire-chamber, and running in the same direction as the grate-bars and flue H, I sometimes arrange a steam-pipe,

K, having any suitable number of nozzles, Ir, projecting into said flue H, steam being supplied to this pipe from a separate boiler, if such steamj ets are required, in furnaces which do not raise steam.

The dotted-lines at L represent any ordinary blower or fan, and Z the pipe'leading from same to a point underneath the grate, as is customary in blast or other furnaces requiring an additional supply of air for draft and for aiding combustion.

In operating my invention steam-jets'will not be'required in all cases, as I chiefly rely on the blower or fan L toforce the air (which is warmed first in the ash-pit and brought to a high temperature in the side fines, J J out upon the fire from the flue H, such additional supply of air, as is well known, aiding the combustion of the light carbon and gases arising from the fire.

Heretofore, to the best of my knowledge, a blower has only been used to act on the fire by forcing a current of air from underneath up between the grate-bars. By my invention I utilize the force of the blower to project currents of air through my verticalilues into the transverse flue, and thus over the fire, which I have found gives much better results than when introduced as first mentioned. Of course steam-jets will greatly assist in the introduction of this air above the fire, and the hydrogen of the steam will also form a valuable addition in thehonsumption of the smoke, as I haveexplained in my previous patents, and as is well known to engineers. It will be seen, also, that by introducing an additional volume of air at the neck of a furnace such as is shown in the drawings, I causewhatever particles of carbon and the gases which may esclass, and I do not broadly claim such as my invention; nor do I claim, broadly, the introduction of air to the fire-chamber above the grate'by means of flues and passages in the walls of the furnace leading from the ash-pit, my invention being limited to the arrangement particularly described; but

What I claim, and desire to secure by Letters Patent, is as follows: v

1. For introduction of air to the fire-chamber above the grate, vertical flues J J, formed.

in the side walls, and opening at their lower ends into the ash-pit, and joined at their upper ends to a flue, H, formed at the crown of 7 .iAMns ELLIOTT.

Witnesses:

It. A. KELLOND, J. E. JoDERY. 

